Longest Uptime Streak
A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L5
Interview Prompt
Find the longest consecutive streak of 'healthy' statuses (case-insensitive) for any single service. A streak ends when the service records a non-healthy check. Return the service name and streak length.
Summary
Pass, pass, pass. How long until fail?
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision